/Engine/Source/Runtime/Analytics/AnalyticsET/Public/IAnalyticsProviderET.h
This class augments StartSession with a version that takes the SessionID instead of always generating it. Implement the base version in terms of this one.
virtual bool StartSession ( const [TArray](API\Runtime\Core\Containers\TArray)< [FAnalyticsEventAttribute](API\Runtime\Analytics\FAnalyticsEventAttribute) > & Attributes )